Device for operating valves for fluid-pressure brakes



(No Model.)

. J..H.' POX. DEVICE FOR OPERATING VALVES FOR FLUID PRE$SURE BRAKES.

No. 513,676. Patented Jan. .30, 1894.

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UNITED STATES PATENT OFFICE.

JOHN H. FOX, OF BOSTON, MASSACHUSETTS.

DEVICE FOR OPERATING VALVES FOR FLUID-PRESSURE BRAKES.

SPECIFICATION forming part of Letters Patent No. 513,676, dated January30, 1894. Ap li ati fil d March 11, 1893. Serial ll'o. 465,656. (Nomodel.)

To all whom, it may concern:

Be it known that I, JOHN H. FOX, of Boston, in the county of Sufiolk andCommonwealth of Massachusetts, have invented certain improvements inthat class of devices by which the valves of steam or air brakes onmoving trains are automatically operated by mechanism placed beside thetracks, of which the following is a specification,

My invention consists in the construction of the arm or lever whichprojects from the valve of the air or steam brake, and by which it isoperated, in two portions, one of which is secured to the movable partof the valve and the other is an arm or pendent portion which is pivotedto the end of the first mentioned arm. I prefer to give this pendentportion a movement in a limited are upon its pivot, by the use ofshoulders or equivalent means, so that after it has been swung a shortdistance upon either side of a vertical line by the action of a suitabledevice beside the railway track, it will act upon and raise the leverwhich is attached to the valve and thus open the latter.

The object of my improved construction is to obviate the shock whichoccurs, in apparatus heretofore used, between the valve openingattachments and the devices placed beside the track which act upon suchattachments, and by the employment of the supplemental arm pivoted atthe end of the valve operating lever, the shock and friction between theseveral parts are reduced to a minimum.

In the drawings forming a part of this specification, Figure 1, is a topview of the valve operating lever. Fig. 2, is a side elevation of thelever with the supplemental arm pivoted at its outer end; the valve andthe outer end of the valve operatingleverbeing in section.

In the drawingsI have shown my improved valve operating lever applied toa valve constructed with a sleeve which turns upon a fixed innerportion, the raising of the lever opening the valve by bringing theports in the two parts opposite one another.

Referring to the drawings, 0, is the fixed portion of the valve, D themovable sleeve which surrounds it, the operating lever H being attachedto the sleeve D.

S is the supplemental arm pivoted to the lever H at t.

u, u are shoulders against which the arm S bears when it is swung oneway orthe other by contact with the device 0, placed beside the track.

0, d are the ports in the respective parts O and D of the valve, andwhen the train is moving forward as indicated by the arrow, the arm Swill be forced back against the shoulder u, to the position indicated asS in dotted lines, Fig. 2, and the further forward movement of the trainwill raise the lever H and bring the ports 0 and d, into coincidencethus opening the valve.

When the train is moving in a direction opposite to that indicated bythe arrow, the supplemental arm of the lever H will be forced into theposit-ion indicated by the dotted lines as S and as in the otherinstance, a further movement of the train will force the arm S upward,raise the lever H and open the valve.

I claim-- In combination with the valve of a steam or air brake, ajointed operating lever one member of Which is secured to the movablepart of the valve, the other member of which hangs normally in avertical line when in position upon the engine or car and is adapted toswing in an arc of a circle upon either side of said vertical line bycontact with an actuating device beside the rail, and means for limitingthe movement of the swinging member upon the other member, substantiallyas described and for the purpose specified.

. JOHN H. FOX.

Witnesses:

A. J. BUEEoWs, T. J. CUNNINGHAM.

